Threshold photoelectron spectra of atmospheric molecules. I. Description of method and application to H2, D2, and N2

Publisher Website
Google Scholar
Abstract
Threshold photoelectron spectra (TPES) are presented for H2, D2, and N2 with a resolution of 28 meV full width at half maximum. The results are compared with Franck–Condon transition probabilities, previous TPES and electron attachment threshold photoelectron spectra. Peaks in the TPES not predicted by Franck–Condon calculations are explained by autoionization processes. These processes in N2 make possible the observation of vibrational levels of the ions not visible spectroscopically or in photoelectron spectra. A shift of the TPES peaks in N2 toward lower energy is explained by conversion of rotational energy in the ionization transition. Peaks between the v=O and v=1 vibrational levels of the X 2Σg+ state of N2+ consist of near monoenergetic electrons implying little or no change in the rotational quantum number in the autoionization process.

This publication has 39 references indexed in Scilit: